Dead battery in boot of s600 v12.
To get in boot to replace or remove to charge battery you will need spare charged battery and jump leads or jump pack.
You need a piece of metal same thickness and width/shape of fuse but 25mm longer making up.
Unlock door with key.
Open bonnet.
Remove fusebox cover.
Remove fuse 17.
Put in made fuse.
Connect live jump lead to made fuse and earth other cable on body somewhere.
Press key fob to unlock central locking.
Open boot.
remove jump leads.
Remove made fuse and replace original fuse.
Charge or replace battery from boot.